Impact of system parameters on quenching heat transfer in the candidate materials for accident tolerant fuel-cladding in LWRs

Implementation of fiber optic temperature sensors in quenching heat transfer analysis

“…4.1 for 12 • C subcooling. As the surface roughness is one indicator of the wettability of the surface, these results are in line qualitatively with previous studies [9,19]. Additionally, the SS304 and Inconel samples are shown to have a larger range in quenching temperatures as the surface roughness increases.…”

“…This manifests as a faster quenching front propagation speed, which shown in Fig. 4.7, from the optic fiber data, and is noted to occur with increased subcooling [9,23]. Fig.…”

“…These ATF candidate materials are designed to be more able to withstand the stresses that occur in an accident scenario due to rapid changes in temperature. Several studies have been conducted on various candidate materials and their enhancement of CHF and T min [7,9,10,11]. These studies have shown a dependence of these transient phenomena on the surface characteristics such as contact angle and surface roughness, as well as on the thermal properties of the cladding material.…”

“…where T CR is the bulk liquid critical temperature. Kang et al [9] conducted quenching tests on three ATF candidate materials, FeCrAl, SiC-CVD, and Zry-4, under varying degrees of subcooling, pressures, and mass flow rates. Results showed an increase in the quenching temperature with subcooled bulk coolant compared to saturated conditions, as well as an increase in the total time required to quench the entire heated surface.…”

Carbon-Based Nanofluids and Their Advances towards Heat Transfer Applications—A Review

“…The performance of the pool boiling is evaluated by the enhancement in CHF, HTC, T min , and vapor film thickness. In literature, the effects of the following parameters have been studied: substrate material [ 340 ], surface conditions and oxidation [ 341 , 342 ], system pressure [ 343 , 344 ], initial wall temperature [ 345 ], shape and dimension of the testing specimen [ 346 , 347 ], degrees of liquid subcooling [ 348 , 349 , 350 ], surface wettability and vapor–liquid contact angle [ 351 ], surface roughness and wickability [ 352 ], and type of quenchant such as water, oil, or nanofluids [ 353 , 354 ]. Recently, researchers have been focused on the effects of the later parameter on pool boiling heat transfer performance.…”